Preparation method of cuprous oxide modified graphene gas sensitive material and preparation method of gas sensitive element

By preparing cuprous oxide-modified graphene gas-sensitive materials, a PP-type homo-heterojunction is formed, which solves the problems of difficult online monitoring of SF6 gas decomposition components and high-temperature operation, and realizes gas sensing with rapid response and high sensitivity at room temperature, which is suitable for online monitoring of SF6 gas insulation equipment.

CN122444175APending Publication Date: 2026-07-24STATE GRID JIANGSU ELECTRIC POWER CO LTD MAINTENANCE BRANCH
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Patent Information

Application Number
CN202610572140.9
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Priority Date
2025-12-11
Filing Date
2026-04-28
Publication Date
2026-07-24

AI Technical Summary

Technical Problem

In existing technologies, online monitoring of SF6 gas decomposition components is difficult and costly. Sensors require high temperatures to operate and have slow response recovery, which cannot meet the power system's need for real-time and rapid early warning of insulation faults.

Method used

A method for preparing cuprous oxide-modified graphene gas-sensitive materials was adopted. By combining cuprous oxide with graphene to form a pp-type iso-heterojunction, and then combining it with a hydrothermal synthesis method to prepare gas-sensitive elements, rapid response and baseline recovery at room temperature were achieved.

Benefits of technology

It achieves high sensitivity and selectivity in the detection of SF6 decomposition component gases H2S, SO2, SOF2, and SO2F2 at room temperature, reduces energy consumption, simplifies sensor structure, and is suitable for online monitoring of SF6 gas-insulated equipment.

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Abstract

The application discloses a preparation method of a cuprous oxide modified graphene gas sensitive material and a preparation method of a gas sensitive element. The preparation method of the gas sensitive material comprises the following steps: preparing intrinsic graphene; mixing the intrinsic graphene with ultrapure water in a mass ratio of 1:1.9-1:2.1, and preparing a graphene dispersion liquid through ultrasonic dispersion; adding a copper acetate solution with the same volume as the ultrapure water into the graphene dispersion liquid, sufficiently mixing, and stirring at room temperature to obtain a first mixed solution; after the stirring is completed, adding a sodium hydroxide solution with a volume ratio of 1.20:1-1.30:1 to the first mixed solution, and obtaining a second mixed solution after ultrasonic treatment; adding a glucose solution with a volume ratio of 1.45:1-1.55:1 to the second mixed solution to obtain a third mixed solution; moving the third mixed solution to a high-pressure reaction kettle, and performing hydrothermal reaction under constant temperature conditions; cooling the solution after the hydrothermal reaction to room temperature, removing upper clear liquid after centrifugal treatment, leaving the centrifugal precipitate, and drying to obtain the cuprous oxide modified graphene gas sensitive material.
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Citation Information

Patent Citations

  • Detection method of SF6 decomposition products based on graphene composite material sensor array

    CN109060892B